Mother Jones reporter Andy Kroll appeared on Current TV’s Countdown to discuss the latest developments in the Trayvon Martin case. George Zimmerman claims that Martin attacked him, punched him in the face, and “repeatedly slammed his head into the sidewalk” before Zimmerman shot him. But police surveillance video of Zimmerman recorded the night of the shooting shows Zimmerman without any visible blood or wounds. Andy Kroll analyzes what this new evidence could mean for the outcome of the investigation.